* TODO:
  * https://github.com/rust-lang/rust#building-from-source
  - https://doc.rust-lang.org/stable/book/
  * https://doc.rust-lang.org/nightly/book/
  * https://github.com/carols10cents/rustlings
  * https://github.com/flosse/rust-os-comparison
  * rustbyexample.com
  * https://github.com/ctjhoa/rust-learning#books
  * https://users.rust-lang.org/
  * https://nbaksalyar.github.io/2015/07/10/writing-chat-in-rust.html

